Loss of mitochondrial calcium uniporter rewires skeletal muscle metabolism and substrate preference.
Loss of mitochondrial calcium uniporter rewires skeletal muscle metabolism and substrate preference.
复制标题
线粒体钙单向转运体的丢失重新连接骨骼肌代谢和底物偏好。
DOI:
10.1038/s41418-018-0191-7
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发表时间:
2019-01
影响因子:
12.4
通讯作者:
Mammucari C
中科院分区:
文献类型:
--
作者:
Gherardi G;Nogara L;Ciciliot S;Fadini GP;Blaauw B;Braghetta P;Bonaldo P;De Stefani D;Rizzuto R;Mammucari C
Skeletal muscle mitochondria readily accumulate Ca2+ in response to SR store-releasing stimuli thanks to the activity of the Mitochondrial Calcium Uniporter (MCU), the highly selective channel responsible for mitochondrial Ca2+ uptake. MCU positively regulates myofiber size in physiological conditions, and counteracts pathological loss of muscle mass. Here, we show that skeletal muscle-specific MCU deletion inhibits myofiber mitochondrial Ca2+ uptake, impairs muscle force and exercise performance, and determines a slow-to fast switch in MHCs expression. Mitochondrial Ca2+ uptake is required for effective glucose oxidation, as demonstrated by the fact that in muscle-specific MCU-/- myofibers oxidative metabolism is impaired and glycolysis rate is increased. Although defective, mitochondrial activity is partially sustained by increased fatty acid (FA) oxidation. In MCU-/- myofibers, PDP2 overexpression drastically reduces FA-dependency, demonstrating that decreased PDH activity is the main trigger of the metabolic rewiring of MCU-/- muscles. Accordingly, PDK4 overexpression in MCUfl/fl myofibers is sufficient to increase FA-dependent respiration. Finally, as a result of the muscle-specific MCU deletion, a systemic catabolic response impinging on both liver and adipose tissue metabolism occurs.
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影响因子:
8.8
作者:
Kwong JQ;Lu X;Correll RN;Schwanekamp JA;Vagnozzi RJ;Sargent MA;York AJ;Zhang J;Bers DM;Molkentin JD
通讯作者:
Molkentin JD
DOI:
10.1126/science.1242993
发表时间:
2013-12-13
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Sancak Y;Markhard AL;Kitami T;Kovács-Bogdán E;Kamer KJ;Udeshi ND;Carr SA;Chaudhuri D;Clapham DE;Li AA;Calvo SE;Goldberger O;Mootha VK
通讯作者:
Mootha VK
影响因子:
29
作者:
McCommis KS;Chen Z;Fu X;McDonald WG;Colca JR;Kletzien RF;Burgess SC;Finck BN
通讯作者:
Finck BN
影响因子:
--
作者:
TeSlaa, Tara;Teitell, Michael A.
通讯作者:
Teitell, Michael A.
影响因子:
64.8
作者:
De Stefani, Diego;Raffaello, Anna;Teardo, Enrico;Szabo, Ildiko;Rizzuto, Rosario
通讯作者:
Rizzuto, Rosario